Guy's Behavior

What does it mean if a guy gives me his password?

So I have this Guy who is my crush actually, I have best phone in my class and have my friends playing with it because I have internet in the school. So when my crush sometimes asks me to give him my phone and that’s quite rare because his friend always asks for it... and when they watch videos and stuff both of them together.. So I gave him my phone and he want in Facebook, in his Facebook. He want in Messanger after that and Just Remembered his Messanger/Fb on my phone... so whenever I wanted I could click and go in. I got shocked so I asked him and he told me it’s okay and I can have it and even told me his password without telling his email. When my friend who was also his friend got Shocked because one time she asked him if she could have it and he said no.. after that i was like okay... and when he changed it after a week or something... when I asked him about it he said someone broke his fb.. I got more shocked and when We kind of talked and he gave me his password again! Without telling me whyyy? And on top of that none knows his password... Except me and him. But now he changed it again and kind of asked me if I wanted password couple of times but I said why and yeah kind of ignored that question... so I don’t understand why would he give me his password? I don’t know him that well actually he is just a friend not close or anything... so it’s weird, can someone explain?
What does it mean if a guy gives me his password?
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